Pump head



FIG. 1 is a top, front, right perspective view of a pump head showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof; and,

FIG. 5 is a top view thereof.

The broken lines showing the remainder of the pump head are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a pump head, as shown and described. 